Hiroshima after the nuclear bomb named "Little boy" on the B-29 "Enola Gay" the 6 August 1945. Shortly after 8 am 15, the Little Boy bomb out of the cargo hold at an altitude of 9450 m. At 8 h 16 min 2 sec after about 43 seconds of free fall, enabled by the altitude sensors and radars, it exploded 580 meters vertically above the Shima Hospital in the heart of the metropolitan area, about 300 m southeast of the initially targeted bridge, releasing energy equivalent to about 15,000 tons of…